I purchased this lens as a compromise "walk-around" lens, and have yet to be disappointed with its utility in this regard. Focusing in dim light can be something of a challenge, but using a technique where you let up on the shutter button when you approach exact focus, and then quickly pressing again will pretty much eliminate any hunting problems. This does not have a "USM" type focus motor, so there is a soft buzz as the lens focuses. Focus is quick, but could draw attention in a quiet area.

The lens cap is designed with a double release system, with release flanges on the edge of the cap and at the center of the cap (great for attaching/detaching the cap with the lens hood in place.

For the combination of price and versatility, this is the lens to get.